A plane that was leaving Philadelphia's International Airport and heading to London was forced to turn around late Tuesday night after a passenger was being drunk and unruly, according to reports.

CBS3 reported that US Air flight 728 was delayed a half hour Tuesday night and then when it finally took off, an hour into the flight passengers were told the plane would be turning around.

Authorities said the passenger, who was not identified, was drunk and trying to grope female passengers on the plane. The flight got as far as Massachusetts but had to turn back around. Then when it got to Philadelphia, it had to circle the sky for awhile to burn off fuel, according to reports.

When the plane finally landed back in Philadelphia, the passenger was arrested. FBI and Air Marshals are investigating, according to 6ABC.

Strange experience on @USAirways tonight. Flight turned around after an hour to remove an unruly passenger. Air marshalls swooped in.